NO. 1577. MAMMALS COLLECTED LX WESTERN BORNEO— LYOX. 



569 



NASALIS LARVATUS (Wurmb^. 



Of this handsome and strikingly marked monkey. Doctor Abbott 

 secured nine skins with skulls, and one odd skull. The skins are 

 quite uniform in color and markings. Cat. No. 142418, II.S.N.M., 

 has the legs grayer than the average and is slightly more gray across 

 the shoulders than the majority of specimens. Cat. No. 142219, 

 TT.S.N.INI., an adult nuxle, is distinctly gray across the shoulders, and 

 is further different from the other specimens in having the diamond- 

 shaped rump patch smoky gray instead of cream color, as have all 

 the other specimens except Cat. No. 142222, U.S.N.M., an immature 

 female, where the color is likewise smoky gray. In Cat. Nos. 142221 

 and 142224, U.S.N.M., adult females, the rump patch is interme- 

 diate in color between cream color and smoky gray. The dorsal 

 neck stripe is most pronounced in the adult males. 



Compared with a mounted specimen in the United States National 

 Museum, from northern Borneo, the present series is distinctly 

 brighter in color, but the pattern is everywhere the same. This 

 difference is probably due to fading in the mounted specimen, or to 

 the action of pickling fluids. For external and cranial measure- 

 ments see table below. The difference in size between the two 

 sexes is very marked. The skins of the females have the hair softer 

 and more immature looking than do the skins of males. The 

 oldest female has less than half the weight of adult males which are 

 not quite so old. 



External and cranial nteasiirt'mf'nfs of Nasalis larvafiis/rorn vpstei-n Borneo. 



a Collector's measurements. 



* Skull only; milk teeth all shed but permanent teeth not quite fully in place. 



